It is another method by which the F. Very often but not always a TSO part is a replacement for an original part. A TSO produced part must only meet minimum prescribed F. There are a couple of important differences.
PLM Good Practice Defining and using purchased parts Almost every company purchases parts — defined and produced by other manufacturers — to build and market their own products.
But as any component engineer can tell you, similar part numbers don't represent equivalent parts. We'll define different types of part numbers, and describe their use in the supply chain. Part requirements always identify the part's form, fit and function; in addition, they often address quality, endurance, environmental, regulatory, or other characteristics.
A home part number represents A set of technical requirements — what the part must do in your application s ; and The physical item that meets those requirements; and A warehouse location for that physical item.
The part's description includes enough information to help distinguish it from similar parts in your warehouse or database. But except for very simple parts, neither the part number nor the description are the complete requirements.
Define the part's physical characteristics, interfaces, performance, environmental compliance, endurance or any other attributes that are needed to fulfill its function in your application. Don't over-specify the part. A minimum set of requirements provides flexibility and lower cost.
For example, although all manufacturers may specify their part's weight, you should simply ignore it when weight isn't relevant to your application. Some "requirements" may be undocumented or implied based on accepted industry practices.
Requirements must be revised and expanded when these assumptions fail; or to reflect a new application of an existing part; or when you discover unexpected uses for an existing product.
There are two broad categories of supplier-issued part numbers: Model numbers represent products with a constant market position or message, yet have evolving technical capabilities.
Think of a BMW or Boeingwhich are not backwards-compatible or fully interchangeable over time, yet have consistent brand identities. OEM datasheet numbers represent unchanging technical specifications. The underlying part may evolve in materials, cost or performance, but the part specifications promise a consistent backwards-compatible product.
This second type, a source part number, identifies a part that may be qualified and purchased for use in your product designs. A source part number represents A set of technical specifications — how the part performs under conditions specified by the manufacturer; and The physical item that meets those specifications; and A catalog or sales identifier for purchasing that physical item.
The source part number which may include non-numeric characters is assigned by its manufacturer. Different manufacturers may use the same part number to represent similar parts, or completely unrelated items. Therefore, both the manufacturer and the number are required to uniquely identify a part.
Source specifications are not a substitute for requirements. Your part may require some of the specified properties while ignoring others, and your part may require different conditions. You may even have requirements that the source part fulfills but the supplier doesn't specify.
In most cases, specifications that exceed requirements are perfectly acceptable. When a source part's published specification doesn't meet the home part's requirement, then: The source part isn't suitable for your application, and can't be added to your part's source list; or Your requirement is too demanding or not even needed and can be revised; or Where the extra cost is justified, each source part can be individually tested for compliance.
In this last case, parts may be selected to meet requirements that the supplier doesn't specify. Parts usually exhibit a normalized distribution; higher-grade parts can be chosen with processes like sorting and burn-in. These procedures must be documented, and there'll be added costs for testing and possible scrap.
The source part number should not be used directly on your bills of materials, since this prevents substituting equivalent source parts. The manufacturer's own internal requirements are not the same as its published specifications.
For example, the part datasheet won't describe exact formulations of the part's materials or the manufacturing processes required to fabricate the part. These are controlled by the manufacturer's home part number, and may change over time.
You won't care about these hidden characteristics, provided that the part continues to meet the published specifications or passes the selection process.
If you limit requirements to only what's actually needed for your application, then more source parts may be eligible for the list. On the other hand, actual production and field experience may disqualify sources that would otherwise be considered for the list. If you simply assign a source part's specifications as your own requirements, then you've adopted the selected part as the sole source.
You lose all flexibility to make substitutions because no other manufacturer is likely to exactly duplicate the original source's spec. It's worse if you adopt the manufacturer's actual part number as your own. When the original part is no longer available, becomes prohibitively expensive, or has performance or reliability problems, all BOMs must be revised with another part.
Assign your own number so that approved sources could be easily changed without revising BOMs. Distributors and resellers deliver what the manufacturer produces, and have no control over specifications.The performance code was created in cooperation with the leading wheel and brake manufacturers around the globe.
These wheel producers depend on Timken and our expertise to make each touch down a moment you can trust. ASA/AFRA Keynote Speaker Announced - Jon Turner, Vice President, Air Canada Maintenance!
Registration is Open for Regulatory Workshops in Seattle, on 12/3 & Los Angeles, CA on 12/5! John Gattasse of Airbus Appointed to ASA Board of Directors. Call for Nominations for ASA Board of Directors.
Click here for the Nomination Survey. information in it, for any purpose, including without limitation to design, manufacture, or repair parts, or obtain FAA or other government approval to do so, without UTC’s express written permission.
“PMA” is an acronym for “Parts Manufacturer Approval.” It is both a design and production approval issued by the FAA. Basically, the FAA permits the manufacture of replacement parts for aircraft if the part has been tested and meets FAA standards for airworthiness and the part is manufactured in accordance with FAA approved procedures.
manufacturer or current design activity to buy, stock, sell or distribute the part and an unbroken chain of traceability documentation through authorized distributors (if applicable), back to the approved source/manufacturer specified in the solicitation/contract.
Parts Manufacturer Approval (PMA) Parts Many time owners and operators will purchase and install a Parts Manufacturer Approval (PMA) Part and the question comes up can PMA parts be installed on Type Certificated aircraft and articles.